Well, there are many ways to "Peel" that proverbial banana - as we like to say here at TaxPeel.com. Let me summarize the basic mass appraisal process. It answers your question on some of the basics but, it is important to understand that each taxing authority has their own policies and procedures. They also have their own game plans and technical expertise to create efficiencies in the process and incorporate quality control measures that help eliminate deficiencies in such a huge task - to value all the properties in their jurisdiction uniformly and fairly.
Let us explain it in our terms - by "layers":
It is the reason that many authorities, as a part of their reassessment process, will request each homeowner to verify the data that the Auditor/Assessor has on record for the property. Many of us have seen the mailer - that states that a reassessment of all properties in a market will be happening in the future and this is the current data we have on record for the property. Is this information correct?